Groovy中String转换Gstring用于动态插值

知识点是Groovy中的模板引擎

GStringTemplateEngine

第一个例子：

　　

def binding = [
     firstname : "Grace",
     lastname  : "Hopper",
     accepted  : true,
     title     : 'Groovy for COBOL programmers'
 ]
 def engine = new groovy.text.GStringTemplateEngine()
 def text = '''\
 Dear <%= firstname %> $lastname,

 We <% if (accepted) print 'are pleased' else print 'regret' %> \
 to inform you that your paper entitled
 '$title' was ${ accepted ? 'accepted' : 'rejected' }.

 The conference committee.
 '''
 def template = engine.createTemplate(text).make(binding)
 println template.toString()

第二个例子:

String stringFromDatabase = 'Hello ${name}!'
String name = 'world'

def engine = new groovy.text.SimpleTemplateEngine()
assert 'Hello world!'== engine.createTemplate(stringFromDatabase).make([name:name]).toString()